Thomas goes out to eat at a restaurant and orders fajitas for $12.95 and orders a soft drink for $1.50. Tax is 7% on his total order, and Thomas plans to leave a 20% tip on the entire bill including tax. How much will his dinner cost including tax and tip?

(12.95 + 1.50)*1.07*1.2 = .....

I can never understand why anybody would leave a tip on the tax.

Total order amount before tax and tip: $12.95 + $1.50 = $14.45

Total order amount after tax: $14.45 * 1.07 = $15.46(15)

Total order amount after tip: $15.46 * 1.20 = $18.55(2)

So Thomas' dinner in total including tax and tip will cost about $18.55

Ikr? Who does that? Maybe Thomas is just super generous.

To calculate the total cost of Thomas' dinner, including tax and tip, we'll follow these steps:

Step 1: Calculate the total cost of the food items.
Thomas orders fajitas for $12.95 and a soft drink for $1.50, so the total cost of the food items is $12.95 + $1.50 = $14.45.

Step 2: Calculate the tax amount on the food items.
The tax rate is 7% on the total order. To find the tax amount, multiply the total cost of the food items by the tax rate: $14.45 * 0.07 = $1.01 (rounded to two decimal places).

Step 3: Calculate the total cost of the food items including tax.
Add the tax amount to the total cost of the food items: $14.45 + $1.01 = $15.46.

Step 4: Calculate the tip amount.
Thomas plans to leave a 20% tip on the entire bill, including tax. To find the tip amount, multiply the total cost of the food items including tax by the tip rate: $15.46 * 0.20 = $3.09 (rounded to two decimal places).

Step 5: Calculate the total cost of the dinner including tax and tip.
Add the tip amount to the total cost of the food items including tax: $15.46 + $3.09 = $18.55.

Therefore, Thomas' dinner will cost $18.55 including tax and tip.